pipeline abstraction

Cargo.toml

@@ -22,6 +22,7 @@ members = [
 	"crates/katana/executor",
 	"crates/katana/node",
 	"crates/katana/node-bindings",
+	"crates/katana/pipeline",
 	"crates/katana/pool",
 	"crates/katana/primitives",
 	"crates/katana/rpc/rpc",
@@ -87,6 +88,7 @@ katana-db = { path = "crates/katana/storage/db" }
 katana-executor = { path = "crates/katana/executor" }
 katana-node = { path = "crates/katana/node", default-features = false }
 katana-node-bindings = { path = "crates/katana/node-bindings" }
+katana-pipeline = { path = "crates/katana/pipeline" }
 katana-pool = { path = "crates/katana/pool" }
 katana-primitives = { path = "crates/katana/primitives" }
 katana-provider = { path = "crates/katana/storage/provider" }

crates/katana/core/src/service/block_producer.rs

@@ -74,28 +74,31 @@ type BlockProductionWithTxnsFuture =
 #[allow(missing_debug_implementations)]
 pub struct BlockProducer<EF: ExecutorFactory> {
     /// The inner mode of mining.
-    pub producer: RwLock<BlockProducerMode<EF>>,
+    pub producer: Arc<RwLock<BlockProducerMode<EF>>>,
 }
 
 impl<EF: ExecutorFactory> BlockProducer<EF> {
     /// Creates a block producer that mines a new block every `interval` milliseconds.
     pub fn interval(backend: Arc<Backend<EF>>, interval: u64) -> Self {
-        let prod = IntervalBlockProducer::new(backend, Some(interval));
-        Self { producer: BlockProducerMode::Interval(prod).into() }
+        let producer = IntervalBlockProducer::new(backend, Some(interval));
+        let producer = Arc::new(RwLock::new(BlockProducerMode::Interval(producer)));
+        Self { producer }
     }
 
     /// Creates a new block producer that will only be possible to mine by calling the
     /// `katana_generateBlock` RPC method.
     pub fn on_demand(backend: Arc<Backend<EF>>) -> Self {
-        let prod = IntervalBlockProducer::new(backend, None);
-        Self { producer: BlockProducerMode::Interval(prod).into() }
+        let producer = IntervalBlockProducer::new(backend, None);
+        let producer = Arc::new(RwLock::new(BlockProducerMode::Interval(producer)));
+        Self { producer }
     }
 
     /// Creates a block producer that mines a new block as soon as there are ready transactions in
     /// the transactions pool.
     pub fn instant(backend: Arc<Backend<EF>>) -> Self {
-        let prod = InstantBlockProducer::new(backend);
-        Self { producer: BlockProducerMode::Instant(prod).into() }
+        let producer = InstantBlockProducer::new(backend);
+        let producer = Arc::new(RwLock::new(BlockProducerMode::Instant(producer)));
+        Self { producer }
     }
 
     pub(super) fn queue(&self, transactions: Vec<ExecutableTxWithHash>) {
@@ -143,6 +146,12 @@ impl<EF: ExecutorFactory> BlockProducer<EF> {
     }
 }
 
+impl<EF: ExecutorFactory> Clone for BlockProducer<EF> {
+    fn clone(&self) -> Self {
+        BlockProducer { producer: self.producer.clone() }
+    }
+}
+
 /// The inner type of [BlockProducer].
 ///
 /// On _interval_ mining, a new block is opened for a fixed amount of interval. Within this

crates/katana/core/src/service/mod.rs

@@ -3,7 +3,6 @@
 
 use std::future::Future;
 use std::pin::Pin;
-use std::sync::Arc;
 use std::task::{Context, Poll};
 
 use futures::channel::mpsc::Receiver;
@@ -33,7 +32,7 @@ pub(crate) const LOG_TARGET: &str = "node";
 #[allow(missing_debug_implementations)]
 pub struct BlockProductionTask<EF: ExecutorFactory> {
     /// creates new blocks
-    pub(crate) block_producer: Arc<BlockProducer<EF>>,
+    pub(crate) block_producer: BlockProducer<EF>,
     /// the miner responsible to select transactions from the `pool´
     pub(crate) miner: TransactionMiner,
     /// the pool that holds all transactions
@@ -43,11 +42,7 @@ pub struct BlockProductionTask<EF: ExecutorFactory> {
 }
 
 impl<EF: ExecutorFactory> BlockProductionTask<EF> {
-    pub fn new(
-        pool: TxPool,
-        miner: TransactionMiner,
-        block_producer: Arc<BlockProducer<EF>>,
-    ) -> Self {
+    pub fn new(pool: TxPool, miner: TransactionMiner, block_producer: BlockProducer<EF>) -> Self {
         Self { block_producer, miner, pool, metrics: BlockProducerMetrics::default() }
     }
 }

crates/katana/node/Cargo.toml

@@ -9,6 +9,7 @@ version.workspace = true
 katana-core.workspace = true
 katana-db.workspace = true
 katana-executor.workspace = true
+katana-pipeline.workspace = true
 katana-pool.workspace = true
 katana-primitives.workspace = true
 katana-provider.workspace = true

crates/katana/node/src/lib.rs

@@ -1,5 +1,6 @@
 #![cfg_attr(not(test), warn(unused_crate_dependencies))]
 
+use std::future::IntoFuture;
 use std::net::SocketAddr;
 use std::sync::Arc;
 use std::time::Duration;
@@ -18,14 +19,12 @@ use katana_core::env::BlockContextGenerator;
 #[allow(deprecated)]
 use katana_core::sequencer::SequencerConfig;
 use katana_core::service::block_producer::BlockProducer;
-#[cfg(feature = "messaging")]
-use katana_core::service::messaging::{MessagingService, MessagingTask};
-use katana_core::service::{BlockProductionTask, TransactionMiner};
 use katana_executor::implementation::blockifier::BlockifierFactory;
 use katana_executor::{ExecutorFactory, SimulationFlag};
+use katana_pipeline::{stage, Pipeline};
 use katana_pool::ordering::FiFo;
 use katana_pool::validation::stateful::TxValidator;
-use katana_pool::{TransactionPool, TxPool};
+use katana_pool::TxPool;
 use katana_primitives::block::FinalityStatus;
 use katana_primitives::env::{CfgEnv, FeeTokenAddressses};
 use katana_provider::providers::fork::ForkedProvider;
@@ -57,7 +56,7 @@ pub struct Handle {
     pub rpc: RpcServer,
     pub task_manager: TaskManager,
     pub backend: Arc<Backend<BlockifierFactory>>,
-    pub block_producer: Arc<BlockProducer<BlockifierFactory>>,
+    pub block_producer: BlockProducer<BlockifierFactory>,
 }
 
 impl Handle {
@@ -185,11 +184,10 @@ pub async fn start(
         BlockProducer::instant(Arc::clone(&backend))
     };
 
-    // --- build transaction pool and miner
+    // --- build transaction pool
 
     let validator = block_producer.validator();
     let pool = TxPool::new(validator.clone(), FiFo::new());
-    let miner = TransactionMiner::new(pool.add_listener());
 
     // --- build metrics service
 
@@ -214,21 +212,22 @@ pub async fn start(
 
     let task_manager = TaskManager::current();
 
-    // --- build and spawn the messaging task
+    // --- build sequencing stage
 
-    #[cfg(feature = "messaging")]
-    if let Some(config) = sequencer_config.messaging.clone() {
-        let messaging = MessagingService::new(config, pool.clone(), Arc::clone(&backend)).await?;
-        let task = MessagingTask::new(messaging);
-        task_manager.build_task().critical().name("Messaging").spawn(task);
-    }
+    let sequencing = stage::Sequencing::new(
+        pool.clone(),
+        backend.clone(),
+        task_manager.clone(),
+        block_producer.clone(),
+        sequencer_config.messaging.clone(),
+    );
 
-    let block_producer = Arc::new(block_producer);
+    // --- build and start the pipeline
 
-    // --- build and spawn the block production task
+    let mut pipeline = Pipeline::new();
+    pipeline.add_stage(Box::new(sequencing));
 
-    let task = BlockProductionTask::new(pool.clone(), miner, block_producer.clone());
-    task_manager.build_task().critical().name("BlockProduction").spawn(task);
+    task_manager.spawn(pipeline.into_future());
 
     // --- spawn rpc server
 
@@ -240,7 +239,7 @@ pub async fn start(
 
 // Moved from `katana_rpc` crate
 pub async fn spawn<EF: ExecutorFactory>(
-    node_components: (TxPool, Arc<Backend<EF>>, Arc<BlockProducer<EF>>, TxValidator),
+    node_components: (TxPool, Arc<Backend<EF>>, BlockProducer<EF>, TxValidator),
     config: ServerConfig,
 ) -> Result<RpcServer> {
     let (pool, backend, block_producer, validator) = node_components;

crates/katana/pipeline/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+edition.workspace = true
+license.workspace = true
+name = "katana-pipeline"
+repository.workspace = true
+version.workspace = true
+
+[dependencies]
+katana-core.workspace = true
+katana-executor.workspace = true
+katana-pool.workspace = true
+katana-tasks.workspace = true
+
+anyhow.workspace = true
+async-trait.workspace = true
+futures.workspace = true
+thiserror.workspace = true
+tracing.workspace = true

crates/katana/pipeline/src/lib.rs

@@ -0,0 +1,77 @@
+#![cfg_attr(not(test), warn(unused_crate_dependencies))]
+
+pub mod stage;
+
+use core::future::IntoFuture;
+
+use futures::future::BoxFuture;
+use stage::Stage;
+use tracing::info;
+
+/// The result of a pipeline execution.
+pub type PipelineResult = Result<(), Error>;
+
+/// The future type for [Pipeline]'s implementation of [IntoFuture].
+pub type PipelineFut = BoxFuture<'static, PipelineResult>;
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error(transparent)]
+    Stage(#[from] stage::Error),
+}
+
+/// Manages the execution of stages.
+///
+/// The pipeline drives the execution of stages, running each stage to completion in the order they
+/// were added.
+///
+/// Inspired by [`reth`]'s staged sync pipeline.
+///
+/// [`reth`]: /~https://github.com/paradigmxyz/reth/blob/c7aebff0b6bc19cd0b73e295497d3c5150d40ed8/crates/stages/api/src/pipeline/mod.rs#L66
+pub struct Pipeline {
+    stages: Vec<Box<dyn Stage>>,
+}
+
+impl Pipeline {
+    /// Create a new empty pipeline.
+    pub fn new() -> Self {
+        Self { stages: Vec::new() }
+    }
+
+    /// Insert a new stage into the pipeline.
+    pub fn add_stage(&mut self, stage: Box<dyn Stage>) {
+        self.stages.push(stage);
+    }
+
+    /// Start the pipeline.
+    pub async fn run(&mut self) -> PipelineResult {
+        for stage in &mut self.stages {
+            info!(id = %stage.id(), "Executing stage");
+            stage.execute().await?;
+        }
+        Ok(())
+    }
+}
+
+impl IntoFuture for Pipeline {
+    type Output = PipelineResult;
+    type IntoFuture = PipelineFut;
+
+    fn into_future(mut self) -> Self::IntoFuture {
+        Box::pin(async move { self.run().await })
+    }
+}
+
+impl core::default::Default for Pipeline {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl core::fmt::Debug for Pipeline {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        f.debug_struct("Pipeline")
+            .field("stages", &self.stages.iter().map(|s| s.id()).collect::<Vec<_>>())
+            .finish()
+    }
+}

crates/katana/pipeline/src/stage/mod.rs

@@ -0,0 +1,34 @@
+mod sequencing;
+
+pub use sequencing::Sequencing;
+
+/// The result type of a stage execution. See [Stage::execute].
+pub type StageResult = Result<(), Error>;
+
+#[derive(Debug, Clone, Copy)]
+pub enum StageId {
+    Sequencing,
+}
+
+impl core::fmt::Display for StageId {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        match self {
+            StageId::Sequencing => write!(f, "Sequencing"),
+        }
+    }
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error(transparent)]
+    Other(#[from] anyhow::Error),
+}
+
+#[async_trait::async_trait]
+pub trait Stage: Send + Sync {
+    /// Returns the id which uniquely identifies the stage.
+    fn id(&self) -> StageId;
+
+    /// Executes the stage.
+    async fn execute(&mut self) -> StageResult;
+}